Steven Holl is one of the most well-known and respected architects in the world-- not to mention one of Inhabitat's favorite interview subjects of all time! While his innovative designs can be found across the globe, he has returned to New York to grace Manhattan with yet another showstopper. Holl and his associates broke ground this week on the new Campbell Sports Center at Columbia University. The massive project will be a new green face for the recreational side of Columbia, combining strong and dynamic building elements for the students to enjoy.